using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Net;
using Microsoft.Xna.Framework.Storage;

using Programonica.Igramonica.Core;

namespace Programonica.Igramonica.Graphics
{
    public partial class QuadRenderer
    {
        #region Private Members

        VertexDeclaration vertexDecl = null;
        VertexPositionTexture[] verts = null;
        short[] ib = null;

        private Game game;

        #endregion


        #region Constructor
        public QuadRenderer(Game game)
        {
            this.game = game;
        }
        #endregion


        #region LoadGraphicsContent

        protected virtual void LoadContent()
        {
            IGraphicsDeviceService graphicsService =
                (IGraphicsDeviceService)this.game.Services.GetService(
                                            typeof(IGraphicsDeviceService));

            vertexDecl = new VertexDeclaration(
                                graphicsService.GraphicsDevice,
                                VertexPositionTexture.VertexElements);

            verts = new VertexPositionTexture[]
                        {
                            new VertexPositionTexture(
                                new Vector3(0,0,1),
                                new Vector2(1,1)),
                            new VertexPositionTexture(
                                new Vector3(0,0,1),
                                new Vector2(0,1)),
                            new VertexPositionTexture(
                                new Vector3(0,0,1),
                                new Vector2(0,0)),
                            new VertexPositionTexture(
                                new Vector3(0,0,1),
                                new Vector2(1,0))
                        };

            ib = new short[] { 0, 1, 2, 2, 3, 0 };

        }
        #endregion


        #region void Render(Vector2 v1, Vector2 v2)
        public void Render(Vector2 v1, Vector2 v2)
        {
            IGraphicsDeviceService graphicsService = (IGraphicsDeviceService)
                this.game.Services.GetService(typeof(IGraphicsDeviceService));

            GraphicsDevice device = graphicsService.GraphicsDevice;
            device.VertexDeclaration = vertexDecl;

            verts[0].Position.X = v2.X;
            verts[0].Position.Y = v1.Y;

            verts[1].Position.X = v1.X;
            verts[1].Position.Y = v1.Y;

            verts[2].Position.X = v1.X;
            verts[2].Position.Y = v2.Y;

            verts[3].Position.X = v2.X;
            verts[3].Position.Y = v2.Y;

            device.DrawUserIndexedPrimitives<VertexPositionTexture>
                (PrimitiveType.TriangleList, verts, 0, 4, ib, 0, 2);
        }
        #endregion
    }
}
